Improvement in shutter-workers



UNITED STATES ALLEN BISHOP, OF BROOKLYN, NEW YORK.

PATENT OFFICE. I

IMPROVEMENT lN SHUTTER-WORKERS.

Specification forming part of Letters Patent No. 173,886,dated February 22, 1876; application filed December 1, 1875.

. To all whom it may concern:

, of New York, have invented a new and useful Improvement in Shutter-Workers, which improvement is fully'set forth in the following specification, reference beinghad to the accompanying drawing, in which Figure 1 represents a horizontal section of a window containing my improvement. Fig. 2 is a transverse section of the same; Fig. 3 is an inner View thereof, partly in section.

Similar letters indicate corresponding parts.

My invention relates to certain improvements in shutter-workers; and consists in the novel combination of a box, which is adapted to be fastened to the exterior of a window, and in which is mounted" a gear-wheel, whose shaft carries an arm, which is affixed to the lower edge of the shutter, in conjunction with a pinion, which meshes with the gear-wheel in the aforesaid box, and Which is mounted on the outer-end of a shaft extending horizontally, in an oblique direction, through the sill of the window, and the inner end of which carries a crank, in addition to a recessed wheel, which latter is engaged by a spring-detent, in such a manner that when the horizontal shaft is turned in one or the other direction the shutter is opened or shut, while by the action of the spring-detent and the recessed wheel the shutter is locked in any position to which it may be adjusted.

The horizontal shaft by which motion is given to the mechanism for working the shutter, situated exterior of the window, is made to extend through the window-sill in an oblique direction, whereby the inner end of the shaft is brought a suflicient distance from the end of the window as to permit of using a' crank of large radii, for the purpose'of turning the shaft, when the window is built in a recess or next the wall of an apartment, as hereinafter more fully explained.

In thedrawing, the letter A designates portion of a window, to which is connected a shutter, B, (shown in dotted o'utline,) by means of hinges, one of which is shown at G, Fig. 2. Beneath the hinge O is situated a box, D, which is made to abut against the outer edge of the window-sill, and provided with a cheek,

E, through which it is fastened in place.

Within the box D is arranged a gear-wheel,

F, which has its hearings in the top and bottom plates of the box, one of such plates being made detachable, in order to permit of placing the wheel within the box. To the shaft of the gear-wheel F is secured the inner end of an arm, G, the outer portion of which isaftixed to the lower edge of the shutter B by means of a pivot, a. The gearwheel F meshes with a pinion, H, projecting into the said box D, and which is mounted on the outer end of a horizontal shaft, I. This shaftis made in two parts, one of which extends through a portion of the box D, while the other or main partextends through the window-sill. On the inner end of the shaft I is mounted a crank, J, for the purpose of turning it, and a wheel, K, (best seen in Fig.3,) the circumference of which latter is provided with a series of'recesses, b. The wheel K is engaged by a detent or lever, L, which is pivoted contiguous to the wheel to the inner side of the window. One end of the detent L is bent, as at 0, while its other end is subjected to the action of aspring, M, which has a tendency to throw the ,bent end 0 into the recesses of the wheel. The box D is fastened at such a part of the window that the axis of the gear-wheel F coincides with the axis of the hinges, by means of which the shutter is connected to the window.

' It will be readily understood that when the shaft I is revolved in oneor the other direc tion, motion is given to the pinion and the gear-wheel F, whereby the arm G is oscillated, andthe shutter B is opened or shut, as the case may be; while at the same time, by the action of the detent L on the recessed wheel K, the shutter is locked in any position to which it may be adjusted. By providing the wheel K with recesses b, in contradistinction to teeth, the shaft 1 is prevented from turning in either direction. 7

What I claim as new, and desire to secure by Letters Patent, is

In a shutter-worker, the combination of the box D, gear-wheel F, arm G, the oblique shaft I, and pinion H, the recessed wheel K, springdetent L, and crank J, the whole arranged to operate substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand and seal. ALLEN BISHOP. [L. s.] Witnesses:

L. L. LAIDLAW, ANDREW J. MoUomvucK. 

